An Autonomous Navigation Method for GEO satellites using X-ray Pulsars
An autonomous navigation method for GEO satellites is presented. This method takes advantage of the characteristics of GEO satellites to overcome the shortcoming of the X-ray pulsar measurements: The satellite’s orbit dynamics equation is built up in the Earth-fixed reference frame, so that the equation is weakly non-linear and the extended Kalman filter (EKF) is used in this method in spite of the long observation time of X-ray pulsars. Based on the geopotential model, the obit dynamics equation expressed in the Earth-fixed frame is obtained. The phase measurements of X-ray pulsars are used by EKF to best estimate the satellite’s position and velocity. Numerical simulation is done. It is shown that the navigation results attain convergence quickly if the X-ray pulsar measurements are introduced into the estimation, and the accuracy during the intervals without pulsar measurements is also at a satisfying level.
Liangwei Huang Bin Liang Tao Zhang Wenfu Xu
Automation Department,Tsinghua University,Beijing,10084 PRC Institute of Space Intelligent System,Harbin Institute of Technology,Harbin,Heilongjiang 150001 PRC
国际会议
哈尔滨
英文
517-522
2010-01-08（万方平台首次上网日期，不代表论文的发表时间）